Section: Math

27) An entertainment superstore is running a special sale on DVDs and Blu-ray. DVDs (d) are priced at $8 during the sale while Blu-ray (b) are priced at $15. Each price point is a 20% reduction off the regular price. The sale pulls in $1,250 with 60 total units sold. During a regular day, DVDs and Blu-ray combine for around $800 in total sales while moving two-thirds the number of units on the special sale day. Solving which of the following systems of equations will reveal d and b sold during a regular day?